广播数据系统(RDS)数据组的同步获取

Signal Acquisition of Data Group Synchronization in RDS Receiver

广播数据系统(RDS)接收机信号处理过程中数据组的同步十分重要,是保证准确接收的前提。RDS数据组中每一块的最后10bit由校验字和偏置字组成,它们为消息提供误码校验和块、组同步。因此,本文从RDS数据组结构介绍开始,详细分析CRC校验编解码和快速算法,将传统的循环冗余校验(CRC)运算转化为三字节递推算法,并采用查表法进行快速计算,使MCU在有限的运算速度和内存资源的前提下实现了RDS数据组同步运算。

Datagroup synchronization is very important in signal processing of RDS receiver,it is the premise to ensure that signal reception is exactly right.The last 10 bits which are made up by check words and biasing words in every block of RDS data group provide for message error checking and block,group synchronization.Therefore,this paper firstly introduces the structur e of RDS data group,and it also give a detailed analysis of the CRC check coding,decoding and fast algorithm.It changes traditional CRC algorithm to three bytes algorithm and realizes fast algorithm on table,so that RDS data group synchronization can be completed by MUC in limited calculating speed and resource.